science

Hans Ussing

Hans Ussing is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hans Ussing rather than just read about it. In short: Hans Henriksen Ussing (30 December 1911 – 22 December 2000) was a Danish scientist, best known for having invented the Ussing chamber. In the early 1950s Ussing was the first to describe the mechanism by which ions are actively transported across frog skin.

Key takeaways

Hans Ussing belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Hans Ussing to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Hans Ussing from memory before moving on to harder problems.

Reference excerpt

Hans Henriksen Ussing (30 December 1911 – 22 December 2000) was a Danish scientist, best known for having invented the Ussing chamber. In the early 1950s Ussing was the first to describe the mechanism by which ions are actively transported across frog skin. He studied biology and geography at the University of Copenhagen. In 1943 he received his master's degree (with honors). In 1970 he was awarded the Amory Prize of the American Academy of Arts and Sciences.

References

External links The Royal Society: Hans Henriksen Ussing (Biography) (PDF; 1,1 MB) www.frontiersin.org Hans Ussing (physiologicinstruments.com) Archived 2012-04-02 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with Hans Ussing

Start with the simplest possible case. Write down what Hans Ussing claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Hans Ussing before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Hans Ussing ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Hans Ussing

In research: Hans Ussing appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Hans Ussing in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Hans Ussing is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1911 births, 2000 deaths, 20th-century Danish inventors, so understanding it makes those chapters shorter.
In everyday life: Look for Hans Ussing outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Hans Ussing in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hans Ussing means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Hans Ussing out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hans Ussing in simple terms?

Why does Hans Ussing matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Hans Ussing?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Hans Ussing.